KR102633309B1 - Vehicle body structure and vehicle including the same - Google Patents

Abstract

Disclosed is a car body structure and a vehicle including the same. A car body structure according to an embodiment of the present invention is provided on the floor behind the rear row seats and includes a battery mounting portion where a battery is mounted; A cross member that reinforces the floor in front of the battery mounting area; A lower reinforcement portion that reinforces the floor below the battery mounting portion and is supported by the cross member and side members on both sides; And it includes an upper fastening part that is fastened to the lower reinforcing part in a state where the battery is fastened.

Description

Vehicle body structure and vehicle including the same {VEHICLE BODY STRUCTURE AND VEHICLE INCLUDING THE SAME}

The present invention relates to a car body structure that can mount a large capacity battery while reducing the occupancy of boarding and loading space, and protects the battery from collision by increasing the rigidity of the battery mounting portion, and a vehicle including the same.

Vehicles that use an electric motor as a driving source, such as electric vehicles (EV), hybrid electric vehicles (HEV), and plug-in hybrid electric vehicles (PHEV: Plug-in Hybrid Electric Vehicle), include large-capacity batteries.

As environmental regulations are strengthened, these vehicles are developing into various types such as sedans (Seden), SUVs (Sports Utility Vehicles), and MPVs (Multi-Purpose Vehicles). Depending on the vehicle type, there may be some restrictions on battery installation. In a 5-seater sedan, the battery can be installed behind the second row of seats (loading space) or under the second row of seats. However, SUVs and MPVs have three or four rows of seats installed at the rear of the passenger space and a propeller shaft for 4WD, making it difficult to install a large capacity battery.

Recently, collision laws for vehicles equipped with high-capacity batteries require securing a buffer space around the battery and designing a robust body structure to minimize the impact of a vehicle collision on the battery and safely protect the battery.

One aspect of the present invention seeks to provide a car body structure that can safely protect the battery from collision by increasing the rigidity of the battery mounting portion and securing a buffer area, and a vehicle including the same.

Another aspect of the present invention is to provide a car body structure that allows installation of a large capacity battery while reducing occupant and loading space occupancy, and a vehicle including the same.

Another aspect of the present invention is to provide a car body structure that can minimize restrictions on the installation and movement of rear row seats despite the installation of a large capacity battery, and a vehicle including the same.

According to one aspect of the present invention, a battery mounting portion is provided on the floor behind the rear row seats and the battery is mounted; A cross member reinforcing the floor in front of the battery mounting portion; a lower reinforcement portion that reinforces the floor below the battery mounting portion and is supported by the cross member and side members on both sides; And a car body structure including a; an upper coupling part fastened to the lower reinforcement part in a state in which the battery is coupled.

The battery mounting portion is formed to be recessed downward from the floor and may include a recessed portion that accommodates the lower side of the battery.

The lower reinforcement portion includes a first reinforcement frame extending laterally at a position spaced rearward from the cross member and having both ends supported by the both side members; a plurality of second reinforcing frames extending in the longitudinal direction to connect the cross member and the first reinforcing frame and arranged to be spaced apart from each other in the transverse direction; and a third reinforcement frame extending in the transverse direction and provided on both sides between the cross member and the first reinforcement frame to connect the side members on both sides and the second reinforcement frame adjacent thereto.

The first reinforcement frame may be provided at a position consistent with the rear end of the battery.

The car body structure extends rearward from the position where the first reinforcement frame and the plurality of second reinforcement frames are connected, is supported on the rear bumper, and includes a plurality of structures made of a material less rigid than the first and second reinforcement frames. It may further include a buffer frame.

The upper coupling portion extends laterally to bind the battery, and includes a first coupling frame whose both ends are fastened to the third reinforcing frame; a second binding frame extending laterally to bind the battery and having both ends fastened to the first reinforcing frame; and a plurality of third coupling frames that extend in the longitudinal direction to bind the battery, are coupled to the first and second coupling frames in a cross state, and have front ends each fastened to the plurality of second reinforcement frames. .

The lower reinforcement part is provided in the first to third reinforcement frames and may further include a plurality of reinforcement members that respectively reinforce portions to which the first to third connection frames are fastened.

The car body structure is mounted on the floor to guide the movement of the rear row seats, and may further include a plurality of seat rails each extended to the first coupling frame and fastened to the first coupling frame.

The car body structure is mounted on the floor to guide the movement of the rear row seats, and may further include a plurality of seat rails that extend above the upper fastener and are fastened to the upper fastener.

The car body structure extends rearward from the lower reinforcement portion and is supported on the rear bumper, and may further include a plurality of buffer frames made of a material less rigid than the lower reinforcement portion.

According to another aspect of the present invention, a vehicle including the above-described body structure can be provided.

Since the car body structure according to an embodiment of the present invention includes a lower reinforcement part and an upper reinforcement part, the rigidity of the battery mounting part can be increased.

In the car body structure according to an embodiment of the present invention, the lateral load (P1) is distributed and transmitted to the first and third reinforcement frames of the lower reinforcement part and the first and second connection frames of the upper connection part, and the longitudinal load (P2) is distributed to the lower side. Since it is distributed and transmitted to the second reinforcement frames of the reinforcement part and the third coupling frame of the upper coupling part, the battery can be stably protected from collision.

In the car body structure according to an embodiment of the present invention, when a longitudinal load (P3) is applied from the rear bumper, the plurality of shock absorbing frames, which are less rigid than the first and second reinforcing frames, are deformed and absorb energy, thereby preventing a rear collision. The battery can be reliably protected from damage.

The car body structure according to an embodiment of the present invention has a battery mounting portion at the rear of the rear row seat and a downward recessed portion on the rear floor to accommodate the lower side of the battery, thereby reducing the occupancy of boarding and loading space and enabling the use of a large capacity battery. can be installed.

The car body structure according to an embodiment of the present invention can prevent the battery from being lifted due to inertia even if a frontal collision of the vehicle occurs because the upper coupling portion that connects the upper part of the battery is supported by the seat rail of the rear row seat.

In the car body structure of the embodiment of the present invention, the battery mounting portion is provided at the rear of the rear row seat, so that restrictions on installation and movement of the rear row seat can be minimized despite the installation of a large capacity battery, and when applying 4WD, interference between the propeller shaft and the battery is possible. can be prevented.

1 is a perspective view of a car body structure according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing the configuration around the battery mounting portion of the car body structure according to an embodiment of the present invention.
Figure 3 is a plan view showing the lower reinforcement part of the car body structure according to an embodiment of the present invention.
Figure 4 is a plan view showing the upper connection part of the car body structure according to an embodiment of the present invention.
Figure 5 is a cross-sectional view taken along line A-A' in Figure 4.
Figure 6 is a cross-sectional view taken along line B-B' in Figure 4.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the idea of the present invention to those skilled in the art to which the present invention pertains, and are not limited to what is presented here and may be embodied in other forms. In order to clarify the present invention, the drawings may omit illustrations of parts unrelated to the description, and the sizes of components may be somewhat exaggerated to aid understanding.

Referring to Figures 1 to 3, the car body structure according to an embodiment of the present invention includes a center floor 10 forming the floor of the passenger space, a rear floor 20 forming the rear floor, and a rear floor behind the rear row seats 30. It is provided at (20) and includes a battery mounting portion 50 on which the battery 40 is mounted, a lower reinforcement portion 60 that reinforces the rear floor 20 below the battery mounting portion 50, and a battery 40 on top of the battery 40. ), an upper coupling portion 70 that binds the battery mounting portion 50, a cross member 80 that reinforces the rear floor 20 in front of the battery mounting portion 50, and a rear bumper 90 mounted at the rear.

Here, the rear row seat 30 may be a seat installed at the rearmost part of the passenger space. When the body structure of this embodiment is applied to an SUV or MPV, the rear row seats 30 may be 3 or 4 row seats, and when the body structure is applied to a small SUV with 1st and 2nd row seats, the rear row seats 30 may be a second-row seat.

The cross member 80 extends long in the transverse direction, and both ends are connected to the left rear side member 82 and the right rear side member 83, respectively. The cross member 80 is attached to the lower surface of the rear floor panel 21 and is supported at both ends by the left and right rear side members 82 and 83, thereby increasing the lateral rigidity of the rear floor 20.

As shown in FIGS. 2 and 7, the battery mounting portion 50 may be formed to be recessed to a predetermined depth downward from the surface of the rear floor panel 21 to accommodate the lower side of the battery 40. Specifically, the rear floor panel 21 where the battery mounting portion 50 is located is provided with a depression 52 that is depressed downward and accommodates the lower side of the battery 40.

As shown in Figures 2 and 3, the lower reinforcement part 60 is coupled to the lower part of the rear floor panel 21 where the battery mounting part 50 is located and is connected to the cross member 80 and the rear side members on both sides. By being supported on (82,83), the longitudinal and transverse rigidity of the car body structure is increased.

As shown in FIG. 3, the lower reinforcement portion 60 includes a first reinforcement frame 61, a plurality of second reinforcement frames (62a, 62b, 62c), and third reinforcement frames (63a, 63b) on the left and right sides. may include.

The first reinforcing frame 61 is provided at a position spaced rearward from the cross member 80 and extends laterally in parallel with the cross member 80. Specifically, the first reinforcement frame 61 may be provided at a position matching the rear end of the battery 40. Both ends of the first reinforcement frame 61 are connected to the left and right rear side members 82 and 83.

The plurality of second reinforcing frames 62a, 62b, and 62c extend in the longitudinal direction to connect the cross member 80 and the first reinforcing frame 61 and are arranged to be spaced apart from each other in the transverse direction. The plurality of second reinforcing frames (62a, 62b, 62c) are spaced apart in parallel with each other, with the front end supported by the cross member 80 and the rear end supported by the first reinforcement frame 61, so that the lower part of the battery mounting portion 50 Increases longitudinal rigidity.

The left and right third reinforcement frames (63a, 63b) extend laterally between the cross member (80) and the first reinforcement frame (61), and the left and right rear side members (82, 83) and adjacent thereto Connect the second reinforcement frames 62a and 62c, respectively. The left third reinforcement frame (63a) connects the left rear side member 82 and the adjacent second reinforcement frame (62a), and the right third reinforcement frame (63b) connects the right rear side member 83 and the adjacent second reinforcement frame (62a). Connect the right second reinforcement frame (62c).

The first reinforcement frame 61 and the left and right third reinforcement frames 63a and 63b are supported by the left and right rear side members 82 and 83, respectively, to increase the lateral rigidity of the lower part of the battery mounting portion 50.

A plurality of buffer frames 111, 112, and 113 are installed between the rear bumper 90 and the first reinforcement frame 61 of the lower reinforcement portion 60. The plurality of buffer frames 111, 112, and 113 extend rearward from the position where the first reinforcement frame 61 and the plurality of second reinforcement frames 62a, 62b, and 62c are connected, respectively, and are supported on the rear bumper 90. The plurality of buffer frames 111, 112, and 113 are made of a material with weaker rigidity than the first and second reinforcement frames 61, 62a, 62b, and 62c.

As shown in FIG. 6, the plurality of buffer frames 111, 112, and 113 are made of a material with relatively lower rigidity than the first and second reinforcement frames 61, 62a, 62b, and 62c, and are located at the rear of the battery mounting portion 50. Because it is located, if a collision occurs from the rear, it is deformed and absorbs energy to protect the battery mounting portion 50.

As shown in FIG. 6, this car body structure includes a high-strength area (D) between the cross member 80 where the battery mounting portion 50 is located and the first reinforcement frame 61, the rear bumper 90, and the first reinforcement frame 61. It can be divided into a low intensity area (E) between the reinforcement frames (61).

Because the high-strength area (D) includes a first reinforcing frame (61) with relatively high rigidity, a plurality of second reinforcing frames (62a, 62b, 62c), and third reinforcing frames (63a, 63b) on the left and right sides. By suppressing deformation of the battery mounting portion 50, the battery 40 can be stably protected. Since the low-intensity area (E) includes a plurality of buffer frames (111, 112, 113) with relatively weak rigidity, when a collision occurs from the rear, the plurality of buffer frames (111, 112, 113) are deformed and can absorb the collision energy.

In order to reliably protect the battery 40 from a rear collision, the first reinforcement frame 61, which forms the boundary between the high-intensity area (D) and the low-intensity area (E), is placed at a position matching the rear end of the battery 40. It is advisable to secure a low-intensity area (E, buffer area) of sufficient size at the rear of the battery mounting portion 50.

As shown in FIGS. 1, 2, and 4, the upper fastening portion 70 is fastened to the lower reinforcing portion 60 while binding the upper outer surface of the battery 40 placed on the battery mounting portion 50.

The upper coupling portion 70 extends laterally to bind the battery 40, and the first coupling frame 71, whose both ends are fastened to the third reinforcement frames 63a and 63b, is located at the rear of the first coupling frame 71. A second binding frame 72 extends laterally to bind the battery 40 and has both ends fastened to the first reinforcement frame 61, and extends longitudinally to bind the battery 40 and includes the first and second It includes a plurality of third binding frames (73a, 73b, 73c) which are coupled to the binding frames (71, 72) in a cross state and whose front ends are respectively fastened to a plurality of second reinforcing frames (62a, 62b, 62c).

As shown in FIGS. 4 and 5, the first binding frame 71 and the second binding frame 72 have both ends connected to the first reinforcement frame 61 and the third reinforcement frame 61 in a state of binding the upper side of the battery 40. By being fastened to the reinforcement frames (63a, 63b), in addition to the function of binding the battery 40, the lateral rigidity of the car body structure is improved along with the first and third reinforcement frames (61, 63a, 63b).

As shown in FIGS. 4 and 6, the plurality of third binding frames (73a, 73b, 73c) bind the upper side of the battery 40, and the front end is a plurality of second reinforcement frames (62a, 62b, 62c). ) By being fastened to the front end, in addition to the function of binding the battery 40, it improves the longitudinal rigidity of the car body structure along with the second reinforcement frames 62a, 62b, and 62c on the lower side.

Referring to Figures 5 and 6, the first to third coupling frames (71, 72, 73a, 73b, and 73c) of the upper coupling part 70 are actually the first to third reinforcement of the lower reinforcement part 60, respectively. It is fastened to the upper surface of the rear floor panel 21 at the position where the frames 61, 62a, 62b, 62c, 63a, and 63b are joined. However, as is the case with normal car body structures, the first to third reinforcing frames (61, 62a, 62b, 62c, 63a, 63b) welded to the lower surface of the rear floor panel 21 are the first to third reinforcement frames (61, 62a, 62b, 62c, 63a, 63b) welded to the lower surface of the rear floor panel 21. It can be viewed as a closed square cross-section including a portion of the rear floor panel 21 above the reinforcement frames 61, 62a, 62b, 62c, 63a, 63b. Therefore, the first to third coupling frames (71, 72, 73a, 73b, 73c) can be viewed as being coupled to the first to third reinforcement frames (61, 62a, 62b, 62c, 63a, 63b).

5 and 6 in the first to third reinforcement frames (61, 62a, 62b, 62c, 63a, 63b) at the positions where the first to third binding frames (71, 72, 73a, 73b, 73c) are fastened. As shown, reinforcing members 65 that increase the rigidity of the fastening portion may be installed, respectively. The reinforcing members 65 are accommodated within the closed square cross-section of the first to third reinforcing frames 61, 62a, 62b, 62c, 63a, and 63b. , 63a, 63b) or may be welded to the bottom of the rear floor panel 21.

As shown in FIGS. 4 and 5, in this car body structure, the lateral load P1 acting on the vehicle reaches the battery mounting portion 50 and the first and third reinforcing frames 61 of the lower reinforcing portion 60. Since it is distributed and transmitted to 62a, 62b, 62c, 63a, 63b) and the first and second coupling frames 71 and 72 of the upper coupling portion 70, the battery 40 can be stably protected from lateral collision. In addition, the lateral rigidity can be increased.

In addition, as shown in FIGS. 4 and 6, in this car body structure, the longitudinal load P2 acting from the front of the vehicle reaches the battery mounting portion 50 and the second reinforcing frames 62a of the lower reinforcing portion 60. , 62b, 62c) and the third coupling frames 73a, 73b, 73c of the upper coupling portion 70, so that the battery 40 can be stably protected from longitudinal collision and longitudinal rigidity is improved. It can be raised.

In addition, as shown in FIG. 6, when the longitudinal load P3 acts from the rear rear bumper 90, a plurality of stiffnesses are weaker than the first and second reinforcement frames 61, 62a, 62b, and 62c. Since the shock absorbing frames 111, 112, and 113 absorb energy as they are deformed, the battery 40 can be stably protected from rear collision.

Referring to FIGS. 1, 2, and 4, on the rear floor panel 21, there are a plurality of seat rails 31, 32, 33, and 34 that support the rear row seats (30, 3rd row or 4th row seats) and guide their movement. ) can be installed. The seat rails 31, 32, 33, and 34 extend longitudinally parallel to each other. In addition, the rear end of each seat rail (31, 32, 33, and 34) extends over the first coupling frame 71 of the upper coupling portion 70 and is then fastened to the first coupling frame 71.

In this way, when the plurality of seat rails 31, 32, 33, and 34 are coupled to the first binding frame 71 that binds the upper part of the battery 40, the rear row seat 30 and the occupants seated on the rear row seat 30 The weight is transferred to the first connection frame 71 through a plurality of seat rails 31, 32, 33, and 34 to press the first connection frame 71 downward. That is, the battery 40 may be pressed downward by the rear row seat 30 and the weight of the occupant seated on the rear row seat 30. Therefore, even if a frontal collision of the vehicle occurs, the battery 40 can be prevented from being lifted due to inertia.

As shown in FIG. 6, the car body structure of this embodiment has a battery mounting portion 50 provided at the rear of the rear-row seat 30 installed at the rearmost part of the passenger space, and a battery 40 is installed on the rear floor panel 21. Since it is provided with a depression 52 that is depressed downward to accommodate the lower side, a large capacity battery 40 can be installed while reducing the occupancy of boarding and loading space.

In addition, in the car body structure of this embodiment, the battery mounting portion 50 is provided at the rear of the rear row seat 30, so that restrictions on the installation and movement of the rear row seat 30 can be minimized despite the installation of the large capacity battery 40. And, when applying 4WD, interference between the propeller shaft (not shown) and the battery 40 can be prevented.

10: Center floor, 20: Rear floor,
21: Rear floor panel, 30: Rear row seat,
31,32,33,34: seat rail, 40: battery,
50: battery mounting portion, 52: recessed portion,
60: lower reinforcement part, 61: first reinforcement frame,
62a, 62b, 62c: second reinforcement frame, 63a, 63b: third reinforcement frame,
70: upper connection part, 71: first connection frame,
72: second binding frame, 73a, 73b, 73c: third binding frame,
90: Rear bumper, 111,112,113: Shock absorber frame.

Claims (11)

A battery mounting portion provided on the floor behind the rear row seats and where a battery is mounted;
A cross member reinforcing the floor in front of the battery mounting portion;
a lower reinforcement portion that reinforces the floor below the battery mounting portion and is supported by the cross member and side members on both sides; and
It includes an upper binding part fastened to the lower reinforcement part in a state where the battery is bound,
The lower reinforcement part,
a first reinforcing frame extending laterally at a position spaced rearward from the cross member and having both ends supported by the both side members;
a plurality of second reinforcing frames extending in the longitudinal direction to connect the cross member and the first reinforcing frame and arranged to be spaced apart from each other in the transverse direction; and
A car body structure comprising a third reinforcement frame extending in the transverse direction and provided on both sides between the cross member and the first reinforcement frame to connect the side members on both sides and the second reinforcement frame adjacent thereto. According to paragraph 1,
The battery mounting portion is formed to be recessed downward from the floor and includes a recessed portion accommodating a lower side of the battery. delete According to paragraph 1,
The first reinforcement frame is a car body structure provided at a position coincident with the rear end of the battery. According to paragraph 1,
A plurality of buffer frames each extend rearward from the position where the first reinforcement frame and the plurality of second reinforcement frames are connected and are supported on the rear bumper, and are made of a material less rigid than the first and second reinforcement frames. Including car body structures. According to paragraph 1,
The upper binding part,
a first binding frame extending laterally to bind the battery and having both ends fastened to the third reinforcing frame;
a second binding frame extending laterally to bind the battery and having both ends fastened to the first reinforcing frame; and
A car body structure comprising a plurality of third connection frames that extend in the longitudinal direction to bind the battery, are coupled to the first and second connection frames in a cross state, and have front ends each fastened to the plurality of second reinforcement frames. According to clause 6,
The lower reinforcement part,
A car body structure further comprising a plurality of reinforcing members provided on the first to third reinforcing frames and respectively reinforcing portions to which the first to third coupling frames are fastened. According to clause 6,
A car body structure further comprising a plurality of seat rails mounted on the floor to guide the movement of the rear row seats, each seat rail being extended to the first connection frame and fastened to the first connection frame. According to paragraph 1,
A car body structure further comprising a plurality of seat rails that are mounted on the floor to guide the movement of the rear row seats and are fastened to the upper fastener while extending above the upper fastener. According to paragraph 2,
A car body structure further comprising a plurality of buffer frames each extending rearward from the lower reinforcement portion and supported by the rear bumper, and made of a material less rigid than the lower reinforcement portion. A vehicle including the body structure of any one of claims 1, 2, and 4 to 10.

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